package com.bicntech.admin.controller.common;

import cn.hutool.captcha.AbstractCaptcha;
import cn.hutool.captcha.generator.CodeGenerator;
import cn.hutool.core.convert.Convert;
import cn.hutool.core.util.IdUtil;
import com.bicntech.common.constant.Constants;
import com.bicntech.common.core.domain.R;
import com.bicntech.common.enums.CaptchaType;
import com.bicntech.common.utils.StringUtils;
import com.bicntech.common.utils.reflect.ReflectUtils;
import com.bicntech.common.utils.spring.SpringUtils;
import com.bicntech.framework.config.properties.CaptchaProperties;
import com.bicntech.system.service.ISysConfigService;
import lombok.RequiredArgsConstructor;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.HashMap;
import java.util.Map;

@RestController
@RequiredArgsConstructor
public class CaptchaController {

    private static final ThreadLocal<Map<String,String>> KEY_CACHE = new ThreadLocal<>();
    private final CaptchaProperties captchaProperties;
    private final ISysConfigService configService;


    @GetMapping("/captchaImage")
    public R<Map<String,Object>> getCode(){
        Map<String,Object> ajax = new HashMap<>();
        boolean captchOnOff = configService.selectCaptchaOnOff();
        ajax.put("captchOnOff",captchOnOff);
        if(!captchOnOff){
            return R.ok(ajax);
        }
        String uuid = IdUtil.simpleUUID();
        String verifyKey = Constants.CAPTCHA_CODE_KEY + uuid;
        // 生成验证码
        CaptchaType captchaType = captchaProperties.getType();
        boolean isMath = CaptchaType.MATH == captchaType;
        Integer length = isMath ? captchaProperties.getNumberLength() : captchaProperties.getCharLength();
        CodeGenerator codeGenerator = ReflectUtils.newInstance(captchaType.getClazz(),length);
        AbstractCaptcha captcha = SpringUtils.getBean(captchaProperties.getCategory().getClazz());
        captcha.setGenerator(codeGenerator);
        captcha.createCode();
        String code = isMath ? getCodeResult(captcha.getCode()) : captcha.getCode();
        Map<String,String> redis = new HashMap<>();
        redis.put(verifyKey,code);
        KEY_CACHE.set(redis);
        ajax.put("uuid", uuid);
        ajax.put("img", captcha.getImageBase64());
        return R.ok(ajax);
    }

    private String getCodeResult(String capStr){
        int numberLength = captchaProperties.getNumberLength();
        int a = Convert.toInt(StringUtils.substring(capStr,0,numberLength).trim());
        char operator = capStr.charAt(numberLength);
        int b = Convert.toInt(StringUtils.substring(capStr, numberLength + 1, numberLength + 1 + numberLength).trim());
        switch (operator) {
            case '*':
                return Convert.toStr(a * b);
            case '+':
                return Convert.toStr(a + b);
            case '-':
                return Convert.toStr(a - b);
            default:
                return StringUtils.EMPTY;
        }
    }
}
